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Finding the Fourth Proportional to 128,332.60, 192,134.40 and 121,350.40

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Solution

The fourth proportional to 128,332.60, 192,134.40 and 121,350.40 is: 181,680.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,332.60 : 192,134.40 = 121,350.40 : x
  2. Step 2: Convert to fraction form
    128,332.60/192,134.40 = 121,350.40/x
  3. Step 3: Cross multiply
    128,332.60x = 192,134.40 × 121,350.40
  4. Step 4: Simplify right side
    128,332.60x = 23,315,586,293.76
  5. Step 5: Solve for x
    x = 23,315,586,293.76/128,332.60
  6. Step 6: Final answer
    x = 181,680.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.